Sand-screen



H. S. EARLE.

SAND SCREEN.

APPLICAHON man MAR. 7, 1919.

1,360,906. Patented Nev. 30, 1920.

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WW1 wiwza 2% UNITED STATES VFVFPJATFENT OF I 'HORATIO S. EARLE, OF DETROIT,MICHIGAN.

SAND-SCREEN.

- Application filed mach 7,

To aZZwhom it mag concern:

Be it known that I, HonArio S. EARLE, a

' citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in'Sand-Screens, and declare the following tobe a full, clear, and exact description of the saine, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to sand and gravel screens, and its object is to provide a screen that is comparatively inexpensive in char acter, and further to provide a simple and inexpensive device for spacing the wire strands of which the screen is formed, the spacing means being adapted to securely hold the strands in the desired relative position and one that may be readily removed or attached. A further one is to provide a construction that prevents longitudinal as well as transverse displacement of the wire strands. This screen is preferably used with an inner cylindrical foraminous member of a character and general form as shown in my pending application Serial No. 268,917,

filed Dec. 30, 1918, and the wire fabric is to be held in position on the inner foraminous member in the same manner as is indicated in the said pending application and as is hereinafter described. In its preferred form the invention is shown in the accompanying drawings in which- I Figure 1 is a cross section showing a part of a cylindrical wire fabric and spacing members thereon and apart of the inner foraminous cylinder aboutfwhich the wire fabric is positioned. v

Fig. 2 is a plan view showing a spacing member and a member to which the ends of each wire strand is secured.

V Fig. 3 is an enlarged detail showing the. method of securing the spacing member on the wire strand.

Fig. 4: is a plan view of an alternative. form of construction of the spacing member for the wire fabric. i

The preferred form of the screen is described in the said pending application Serial No. 268,917, and this invention more particularly relates to the method of forming the wire fabric and it is to be understood that the fabric may be either formed on a circle as is herein shown, or it may be a flat Specification of Letters Patent.

Patented Nov. 30, 1920. 1919. Serial m3. 281,284.

screen if so desired. In either case the wire strands '1 forming the body of the wire fabric is-provided with a series of short outwardly bent portions 2 practically equidistantly spaced along the wire and a spacing member is provided which may be of the same gage of wire if it be so desired to space the strands and this spacing member 3 is formed of a wire that is bent back and forth as is indicated in Fig. 2 forming reverse loops spaced apart a distance equal to or slightly greater than the diameter of the wire strands 1. These spacing members are placed over the alined bent portions 2 ofthe strands and a straight wire member 4 is inserted between the bottom of the loops and the spacing member which prevents its removal and which, when in position, holds the wire strands a specific and uniform distance apart depending upon the spacing of the loops of the spacing member. This member 4 is of a length slightly greater than the length of the formed spacing member and the opposite ends thereof are bent over the end bars respectively of the spacing member as is indicated at 5 in Figs. 1 and 2. Thus when the spacing member and fastening strand 4 are in position with the ends of the member 4 bent over the end bars of the spacing member, the strands and spacing member are securely held in the desired relation and accidental displacement thereof is prevented. In the event it is necessary to take out a broken strand, the bent ends 5 of the wire may be straightened and the member 4 withdrawn to an extent to allow the broken strand to be removed and a new strand inserted, whereupon it is repositioned and the ends again bent over the respective ends of the spacing member. The preferred form of the screen, as before stated, is circular and in this case particularly it is necessary to provide a means for securing the ends of each strand together. For this purpose, I provide a plate or bar 6 having a series of transverse slots '7 formed therein as shown in Fig. 2 and spaced apart a distance equal to the required spacing of the strandsand in each of these slots each of the two ends of each wire strand is inserted as shown. After the cylindrical screen has been .formed it is held in position by a stay member 9 similar to that shown in the said pending application Serial No. 268,917, and by means of which the wire fabric may be stretched taut by first turning the lower nut 9' from the interior of the foraminous cylinder 10 which forces the stay outward-and, after properly positioning each member 8, the lock nut 11 is secured to the end thereof bends of the strand and beneath the spacer preventing displacement of the strand, the ends of the fastening Wire being bent about -.th e-respective ends of the spacer.

as may be readily understood, the nut 9l9e.-&'. A cylindrical wire screen consisting of ing a left hand threaded and thenutl-l right hand threaded.

In the event the desired spacing 'ofthe strands is greater than the diameter of the 'wire of which the spacing member 18 formed,

the said spacing member may be bent forming. spaced loops is shown in Fig. 4. In this case, one leg 12 between two loop portions is bent in a manner to space the said loop portions spacing the centers of the loops a greater distance apart than by'tlie form of spacer shown in Fig. 2. In this latter case the slotted plate 16 has the slots formed therein with necessary spacing conformingto the spacing determined by the companion spacing member. In either case the desired spacing of the strands 1 is secured by providing a wire member having 'returnedbent portions, the distance apart of which determines the spacing By providing the loop portions 2 on the wire strands and inserting the fastening member therein, the said strands'are securely held from displacement longitudinally or transversely,

and a fabric is formed that is simple and inexpensive to manufacture and secure in the necessary relationship and yet enables the fabric to be readily repaired.

Having: thus briefly described my-invention, what I claim isv p l. A screen fabric consisting of a series of parallel wire strands, a spacing device extending transversely thereof having reverse looped portions each loop supporting a strand, and a fastening rod posit onedbetween the strands and the spacer intermediate the loop portions thereof.

2Jln a. wire screen, a series of parallel wire strands each having a series of bends formed therein, the bends in'similar position on the several strands beingin alinement transversely of the fabric, and a spacing device for each series ofalined bends consisting of a wire having reverse loop portions in each of which a strand may rest, and arod extending through the loops of the strands and beneath the spacing device.

v3. A wirefsfcreen fabric consisting of a. se-

ries of parallel wire strands each having a series'of'short bends on the same side, a bend ofrthe, Several wires-being in alinement transverse y'ofthe fabric, a wire member formed withireversely positioned loop portions, ,in .eaehof Whicha strand rests, and the loopsof .the, spacer. being of greater lengthuthan. the

loops of thestrand and in which the strand a seriesof circular strands, a-plate or bar having a series of equidistantly positioned slots formed transversely therein, the ends of each strand being hooked in the respective slot, and a series 'ofspacers equidistantly positioned about the screen consisting of a wire strand-bent back and forth providing oppOsitely'positioned looped portions, there strand having a series of equidistantly positioned outwardly bent portions providing loops, a spacer consist ng of a reversely bent wire member forming a series of reverse loops one for each strand, the spacer being adapted to be inserted over the loops of the strands,

and awire member inserted through the strand loops beneath the spacer member.

6. A wire screen fabric consisting of a sericsof 'Wire strands and a series of spacing devices therefor equidistantly positioned longitudinally of the strands, each spacing device consisting of a wire member formed of, reversely positioned loops, the strand of the spacer between the loopsbeing offset to position the loops a predetermined distance apart, the said longitudinal strands and spacer being so formedas to permit introductionof a barbetween the spacer and the strands to secure the spacer in position.

7. A wire screen fabric; consisting of a series of parallel wire strands each having a loop portion, the loops of each strand being ;in the same plane and on the same side of the strand-and the loopswof the several strands being in alinement transversely of the fabric, and a series of, spacing devices ;for tl1e, strands eacl consisting of a wire member having reversely positioned loops, the legof the spacer between the loops bei'ng (offset ,to position the loops a predeterspacer being insertible over the alined loops of ;the strands, and a .wire introduced through the loops of the strandsbelowthe spacer member, the said Wirehaving the. ends bent overtherespe'ctive. ends of the spacer.

. vIn testimony whereof I sign this .specifica tion.

' HORAT'IO EAR-LE. 

